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// <copyright file="ValueObjectBaseSerializationExtensions.cs" company="OOHM PROCESSAMENTO DE DADOS LTDA.">
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//-----------------------------------------------------------------------
namespace AbstractSaaSTemplate.Domain.Models.ValueObjects{    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Text;
    using System.Web.Script.Serialization;
    using System.Xml;
    using System.Xml.Serialization;

    /// <summary>
    /// Provides serialization extensions to the ValueObjectBase.
    /// </summary>
    public static class ValueObjectBaseSerializationExtensions
    {
        /// <summary>
        /// Default deserialization from Xml into the TValueObject.
        /// </summary>
        /// <typeparam name="TValueObject">The type of the value object.</typeparam>
        /// <param name="xml">The xml to be parsed.</param>
        /// <returns>Returns a value object of type TValueObject.</returns>
        public static TValueObject FromXml<TValueObject>(
            this string xml) where TValueObject : ValueObjectBase
        {
            if (string.IsNullOrEmpty(xml))
            {
                throw new ArgumentNullException("xml");
            }

            var typeOfValueObject = typeof(TValueObject);
            return (TValueObject)FromXml(xml, typeOfValueObject);
        }

        /// <summary>
        /// Default deserialization from Xml into the TValueObject.
        /// </summary>
        /// <param name="xml">The xml to be parsed.</param>
        /// <param name="typeOfValueObject">The type of the value object.</param>
        /// <returns>Returns a value object of type TValueObject.</returns>
        public static object FromXml(
            this string xml,
            Type typeOfValueObject)
        {
            var valueObject = null as object;
            using (var reader = new StringReader(xml))
            {
                var xmlTextReader = new XmlTextReader(reader);
                var serializer = new XmlSerializer(typeOfValueObject);
                valueObject = serializer.Deserialize(xmlTextReader);
            }

            return valueObject;
        }

        /// <summary>
        /// Default deserialization from Json into the TValueObject.
        /// </summary>
        /// <typeparam name="TValueObject">The type of the value object.</typeparam>
        /// <param name="json">The json to be parsed.</param>
        /// <returns>Returns a value object of type TValueObject.</returns>
        public static TValueObject FromJson<TValueObject>(
            this string json) where TValueObject : ValueObjectBase
        {
            if (string.IsNullOrEmpty(json))
            {
                throw new ArgumentNullException("json");
            }

            var typeOfValueObject = typeof(TValueObject);
            return (TValueObject) FromJson(json, typeOfValueObject);
        }

        /// <summary>
        /// Default deserialization from Json into the TValueObject.
        /// </summary>
        /// <param name="json">The json to be parsed.</param>
        /// <param name="typeOfValueObject">The type of the value object.</param>
        /// <returns>Returns a value object of type TValueObject.</returns>
        public static ValueObjectBase FromJson(
            this string json,
            Type typeOfValueObject)
        {
            var valueObject = null as ValueObjectBase;
            using (var stream = new MemoryStream())
            {
                var serializer = new JavaScriptSerializer();
                valueObject = (ValueObjectBase)serializer.Deserialize(json, typeOfValueObject);
            }

            return valueObject;
        }

        /// <summary>
        /// Serializes the enumerable of value object into XML.
        /// </summary>
        /// <param name="valueObject">The "this" of the inherited type, if you want to retrieve the default serialization to Xml</param>
        /// <returns>Returns a string with a valid XML representation of the object.</returns>
        public static string ToXml(
            this ValueObjectBase valueObject)
        {
            return ToXml((object) valueObject);
        }
        
        /// <summary>
        /// Serializes the value object into XML.
        /// </summary>
        /// <param name="valueObject">The "this" of the inherited type, if you want to retrieve the default serialization to Xml</param>
        /// <returns>Returns a string with a valid XML representation of the object.</returns>
        public static string ToXml(
            this IEnumerable<ValueObjectBase> valueObject)
        {
            return ToXml((object) valueObject);
        }

        /// <summary>
        /// Serializes the value object into XML.
        /// </summary>
        /// <param name="valueObject">The "this" of the inherited type, if you want to retrieve the default serialization to Json</param>
        /// <returns>Returns a string with a valid XML representation of the object.</returns>
        public static string ToJson(
            this ValueObjectBase valueObject)
        {
            if (valueObject == null)
            {
                throw new ArgumentNullException("valueObject");
            }

            var serializer = new JavaScriptSerializer();
            return serializer.Serialize(valueObject);
        }

        /// <summary>
        /// Serializes the value object into XML.
        /// </summary>
        /// <param name="valueObject">The "this" of the inherited type, if you want to retrieve the default serialization to Json</param>
        /// <returns>Returns a string with a valid XML representation of the object.</returns>
        public static string ToJson(
            this IEnumerable<ValueObjectBase> valueObject)
        {
            if (valueObject == null)
            {
                throw new ArgumentNullException("valueObject");
            }

            var serializer = new JavaScriptSerializer();
            return serializer.Serialize(valueObject);
        }

        /// <summary>
        /// Serializes the enumerable of value object into XML.
        /// </summary>
        /// <param name="valueObject">The "this" of the inherited type, if you want to retrieve the default serialization to Xml</param>
        /// <returns>Returns a string with a valid XML representation of the object.</returns>
        private static string ToXml(object valueObject)
        {
            if (valueObject == null)
            {
                throw new ArgumentNullException("valueObject");
            }

            var typeOfValueObject = valueObject.GetType();
            var serializedObject = new StringBuilder();

            using (var xmlWriter = XmlWriter.Create(
                serializedObject,
                new XmlWriterSettings() { CheckCharacters = true }))
            {
                var serializer = new XmlSerializer(typeOfValueObject);
                serializer.Serialize(
                    xmlWriter,
                    valueObject);
            }

            return serializedObject.ToString();
        }
    }
}


